[m]\frac{a^{-\frac{1}{3}}\cdot \sqrt[3]{a^4}}{a\cdot (a^{\frac{1}{4}})^2}=\frac{a^{-\frac{1}{3}}\cdot a^{\frac{4}{3}}}{a\cdot a^{\frac{1}{4}\cdot 2}}=\frac{a^{-\frac{1}{3}+\frac{4}{3}}}{a\cdot a^{\frac{2}{4}}}=\frac{a}{a\cdot a^{\frac{1}{2}}}=\frac{1}{a^{\frac{1}{2}}}=\frac{1}{\sqrt{a}}[/m]
При a=484 получим
[m]\frac{1}{\sqrt{484}}=\frac{1}{22}[/m]